And of course all the other flights made it back so there was no need for any exhaustive investigations.
There is absolutely a need to investigate those flights as part of an investigation. If they weren't to descend below 6000ft how did all of them end up around 1500ft? A culture of some sort developed where SOP's appeared to be breached. This played a part in Collins flight being so low.
There was only one Accident report issued. Justice Mahon's was a legal opinion,
OK, then Mahon's legal opinion appeared to suffer the same omissions and errors that the report did.